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- //
- // pointer_cast_test.cpp - a test for boost/pointer_cast.hpp
- //
- // Copyright (c) 2005 Ion Gaztanaga
- // Copyright (c) 2005 Peter Dimov
- //
- // Distributed under the Boost Software License, Version 1.0. (See
- // accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt)
- //
- #include <boost/config.hpp>
- #include <boost/pointer_cast.hpp>
- #include <boost/shared_ptr.hpp>
- #include <boost/scoped_ptr.hpp>
- #include <boost/get_pointer.hpp>
- #include <boost/detail/lightweight_test.hpp>
- namespace
- {
- // Let's create these inheritance relationship:
- //
- // base base2
- // | |
- // derived
- // |
- // derived_derived
- //
- class base
- {
- public:
- virtual ~base(){}
- int filler [5];
- };
- class base2
- {
- public:
- virtual ~base2(){}
- int filler [5];
- };
- class derived
- : public base, public base2
- {
- int filler [5];
- };
- class derived_derived
- : public derived
- {
- int filler [5];
- };
- // And now some simple check functions
- #if !defined( BOOST_NO_RTTI )
- template <class BasePtr>
- bool check_dynamic_pointer_cast(const BasePtr &ptr)
- {
- //Check that dynamic_pointer_cast versus dynamic_cast
- return
- //Correct cast with dynamic_pointer_cast
- boost::get_pointer(boost::dynamic_pointer_cast<derived>(ptr)) ==
- //Correct cast with dynamic_cast
- dynamic_cast<derived*>(boost::get_pointer(ptr))
- &&
- //Incorrect cast with dynamic_pointer_cast
- boost::get_pointer(boost::dynamic_pointer_cast<derived_derived>(ptr)) ==
- //Incorrect cast with dynamic_cast
- dynamic_cast<derived_derived*>(boost::get_pointer(ptr));
- }
- #endif
- template <class BasePtr>
- bool check_static_pointer_cast(const BasePtr &ptr)
- {
- return
- //Cast base -> derived -> base2 using static_pointer_cast
- boost::get_pointer(
- boost::static_pointer_cast<base2>(
- boost::static_pointer_cast<derived>(ptr))) ==
- //Now the same with static_cast
- static_cast<base2*>(static_cast<derived*>(boost::get_pointer(ptr)));
- }
- template <class BasePtr>
- bool check_const_pointer_cast(const BasePtr &ptr)
- {
- return
- //Unconst and const again using const_pointer_cast
- boost::get_pointer(
- boost::const_pointer_cast<const base>
- (boost::const_pointer_cast<base>(ptr))) ==
- //Now the same with const_cast
- const_cast<const base*>(const_cast<base*>(boost::get_pointer(ptr)));
- }
- template <class BasePtr>
- void check_all_casts(const BasePtr &ptr)
- {
- #if !defined( BOOST_NO_RTTI )
- BOOST_TEST( check_dynamic_pointer_cast( ptr ) );
- #endif
- BOOST_TEST( check_static_pointer_cast( ptr ) );
- BOOST_TEST( check_const_pointer_cast( ptr ) );
- }
- }
- int main()
- {
- boost::shared_ptr<base> boost_shared(new derived);
- base *plain = boost_shared.get();
- check_all_casts(boost_shared);
- check_all_casts(plain);
-
- return boost::report_errors();
- }
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